In China Desktop PC use is still very popular and it's a growing industry. Depends what you use PCs for, for the average user iPads & iPhones are just fine I guess
Even in China though I'm started to see a major shift (I live in China). For example, my wife's laptop is pretty old and outdated and she's been wanting to upgrade for awhile. However, instead of looking at new laptops or desktops I've noticed she's only been looking at tablets and a couple of smartphones as the ideal product she wants to upgrade to and replace her laptop with.
I found it interesting that the thought of getting a new laptop or a desktop didn't even cross her mind. Of course that's the situation people are talking about when they say the "death of the pc".